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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Copyright (C) 2008 The Guava Authors<a name="line.2"></a>
<span class="sourceLineNo">003</span> *<a name="line.3"></a>
<span class="sourceLineNo">004</span> * Licensed under the Apache License, Version 2.0 (the "License");<a name="line.4"></a>
<span class="sourceLineNo">005</span> * you may not use this file except in compliance with the License.<a name="line.5"></a>
<span class="sourceLineNo">006</span> * You may obtain a copy of the License at<a name="line.6"></a>
<span class="sourceLineNo">007</span> *<a name="line.7"></a>
<span class="sourceLineNo">008</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.8"></a>
<span class="sourceLineNo">009</span> *<a name="line.9"></a>
<span class="sourceLineNo">010</span> * Unless required by applicable law or agreed to in writing, software<a name="line.10"></a>
<span class="sourceLineNo">011</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.11"></a>
<span class="sourceLineNo">012</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.12"></a>
<span class="sourceLineNo">013</span> * See the License for the specific language governing permissions and<a name="line.13"></a>
<span class="sourceLineNo">014</span> * limitations under the License.<a name="line.14"></a>
<span class="sourceLineNo">015</span> */<a name="line.15"></a>
<span class="sourceLineNo">016</span><a name="line.16"></a>
<span class="sourceLineNo">017</span>package com.google.common.collect;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>import com.google.common.annotations.GwtCompatible;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import com.google.common.base.Objects;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.util.Collection;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.util.Map;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.util.Set;<a name="line.24"></a>
<span class="sourceLineNo">025</span><a name="line.25"></a>
<span class="sourceLineNo">026</span>import javax.annotation.Nullable;<a name="line.26"></a>
<span class="sourceLineNo">027</span><a name="line.27"></a>
<span class="sourceLineNo">028</span>/**<a name="line.28"></a>
<span class="sourceLineNo">029</span> * A collection that associates an ordered pair of keys, called a row key and a<a name="line.29"></a>
<span class="sourceLineNo">030</span> * column key, with a single value. A table may be sparse, with only a small<a name="line.30"></a>
<span class="sourceLineNo">031</span> * fraction of row key / column key pairs possessing a corresponding value.<a name="line.31"></a>
<span class="sourceLineNo">032</span> *<a name="line.32"></a>
<span class="sourceLineNo">033</span> * &lt;p&gt;The mappings corresponding to a given row key may be viewed as a {@link<a name="line.33"></a>
<span class="sourceLineNo">034</span> * Map} whose keys are the columns. The reverse is also available, associating a<a name="line.34"></a>
<span class="sourceLineNo">035</span> * column with a row key / value map. Note that, in some implementations, data<a name="line.35"></a>
<span class="sourceLineNo">036</span> * access by column key may have fewer supported operations or worse performance<a name="line.36"></a>
<span class="sourceLineNo">037</span> * than data access by row key.<a name="line.37"></a>
<span class="sourceLineNo">038</span> *<a name="line.38"></a>
<span class="sourceLineNo">039</span> * &lt;p&gt;The methods returning collections or maps always return views of the<a name="line.39"></a>
<span class="sourceLineNo">040</span> * underlying table. Updating the table can change the contents of those<a name="line.40"></a>
<span class="sourceLineNo">041</span> * collections, and updating the collections will change the table.<a name="line.41"></a>
<span class="sourceLineNo">042</span> *<a name="line.42"></a>
<span class="sourceLineNo">043</span> * &lt;p&gt;All methods that modify the table are optional, and the views returned by<a name="line.43"></a>
<span class="sourceLineNo">044</span> * the table may or may not be modifiable. When modification isn't supported,<a name="line.44"></a>
<span class="sourceLineNo">045</span> * those methods will throw an {@link UnsupportedOperationException}.<a name="line.45"></a>
<span class="sourceLineNo">046</span> * <a name="line.46"></a>
<span class="sourceLineNo">047</span> * &lt;p&gt;See the Guava User Guide article on &lt;a href=<a name="line.47"></a>
<span class="sourceLineNo">048</span> * "http://code.google.com/p/guava-libraries/wiki/NewCollectionTypesExplained#Table"&gt;<a name="line.48"></a>
<span class="sourceLineNo">049</span> * {@code Table}&lt;/a&gt;.<a name="line.49"></a>
<span class="sourceLineNo">050</span> *<a name="line.50"></a>
<span class="sourceLineNo">051</span> * @author Jared Levy<a name="line.51"></a>
<span class="sourceLineNo">052</span> * @param &lt;R&gt; the type of the table row keys<a name="line.52"></a>
<span class="sourceLineNo">053</span> * @param &lt;C&gt; the type of the table column keys<a name="line.53"></a>
<span class="sourceLineNo">054</span> * @param &lt;V&gt; the type of the mapped values<a name="line.54"></a>
<span class="sourceLineNo">055</span> * @since 7.0<a name="line.55"></a>
<span class="sourceLineNo">056</span> */<a name="line.56"></a>
<span class="sourceLineNo">057</span>@GwtCompatible<a name="line.57"></a>
<span class="sourceLineNo">058</span>public interface Table&lt;R, C, V&gt; {<a name="line.58"></a>
<span class="sourceLineNo">059</span>  // TODO(jlevy): Consider adding methods similar to ConcurrentMap methods.<a name="line.59"></a>
<span class="sourceLineNo">060</span><a name="line.60"></a>
<span class="sourceLineNo">061</span>  // Accessors<a name="line.61"></a>
<span class="sourceLineNo">062</span><a name="line.62"></a>
<span class="sourceLineNo">063</span>  /**<a name="line.63"></a>
<span class="sourceLineNo">064</span>   * Returns {@code true} if the table contains a mapping with the specified<a name="line.64"></a>
<span class="sourceLineNo">065</span>   * row and column keys.<a name="line.65"></a>
<span class="sourceLineNo">066</span>   *<a name="line.66"></a>
<span class="sourceLineNo">067</span>   * @param rowKey key of row to search for<a name="line.67"></a>
<span class="sourceLineNo">068</span>   * @param columnKey key of column to search for<a name="line.68"></a>
<span class="sourceLineNo">069</span>   */<a name="line.69"></a>
<span class="sourceLineNo">070</span>  boolean contains(@Nullable Object rowKey, @Nullable Object columnKey);<a name="line.70"></a>
<span class="sourceLineNo">071</span><a name="line.71"></a>
<span class="sourceLineNo">072</span>  /**<a name="line.72"></a>
<span class="sourceLineNo">073</span>   * Returns {@code true} if the table contains a mapping with the specified<a name="line.73"></a>
<span class="sourceLineNo">074</span>   * row key.<a name="line.74"></a>
<span class="sourceLineNo">075</span>   *<a name="line.75"></a>
<span class="sourceLineNo">076</span>   * @param rowKey key of row to search for<a name="line.76"></a>
<span class="sourceLineNo">077</span>   */<a name="line.77"></a>
<span class="sourceLineNo">078</span>  boolean containsRow(@Nullable Object rowKey);<a name="line.78"></a>
<span class="sourceLineNo">079</span><a name="line.79"></a>
<span class="sourceLineNo">080</span>  /**<a name="line.80"></a>
<span class="sourceLineNo">081</span>   * Returns {@code true} if the table contains a mapping with the specified<a name="line.81"></a>
<span class="sourceLineNo">082</span>   * column.<a name="line.82"></a>
<span class="sourceLineNo">083</span>   *<a name="line.83"></a>
<span class="sourceLineNo">084</span>   * @param columnKey key of column to search for<a name="line.84"></a>
<span class="sourceLineNo">085</span>   */<a name="line.85"></a>
<span class="sourceLineNo">086</span>  boolean containsColumn(@Nullable Object columnKey);<a name="line.86"></a>
<span class="sourceLineNo">087</span><a name="line.87"></a>
<span class="sourceLineNo">088</span>  /**<a name="line.88"></a>
<span class="sourceLineNo">089</span>   * Returns {@code true} if the table contains a mapping with the specified<a name="line.89"></a>
<span class="sourceLineNo">090</span>   * value.<a name="line.90"></a>
<span class="sourceLineNo">091</span>   *<a name="line.91"></a>
<span class="sourceLineNo">092</span>   * @param value value to search for<a name="line.92"></a>
<span class="sourceLineNo">093</span>   */<a name="line.93"></a>
<span class="sourceLineNo">094</span>  boolean containsValue(@Nullable Object value);<a name="line.94"></a>
<span class="sourceLineNo">095</span><a name="line.95"></a>
<span class="sourceLineNo">096</span>  /**<a name="line.96"></a>
<span class="sourceLineNo">097</span>   * Returns the value corresponding to the given row and column keys, or<a name="line.97"></a>
<span class="sourceLineNo">098</span>   * {@code null} if no such mapping exists.<a name="line.98"></a>
<span class="sourceLineNo">099</span>   *<a name="line.99"></a>
<span class="sourceLineNo">100</span>   * @param rowKey key of row to search for<a name="line.100"></a>
<span class="sourceLineNo">101</span>   * @param columnKey key of column to search for<a name="line.101"></a>
<span class="sourceLineNo">102</span>   */<a name="line.102"></a>
<span class="sourceLineNo">103</span>  V get(@Nullable Object rowKey, @Nullable Object columnKey);<a name="line.103"></a>
<span class="sourceLineNo">104</span><a name="line.104"></a>
<span class="sourceLineNo">105</span>  /** Returns {@code true} if the table contains no mappings. */<a name="line.105"></a>
<span class="sourceLineNo">106</span>  boolean isEmpty();<a name="line.106"></a>
<span class="sourceLineNo">107</span><a name="line.107"></a>
<span class="sourceLineNo">108</span>  /**<a name="line.108"></a>
<span class="sourceLineNo">109</span>   * Returns the number of row key / column key / value mappings in the table.<a name="line.109"></a>
<span class="sourceLineNo">110</span>   */<a name="line.110"></a>
<span class="sourceLineNo">111</span>  int size();<a name="line.111"></a>
<span class="sourceLineNo">112</span><a name="line.112"></a>
<span class="sourceLineNo">113</span>  /**<a name="line.113"></a>
<span class="sourceLineNo">114</span>   * Compares the specified object with this table for equality. Two tables are<a name="line.114"></a>
<span class="sourceLineNo">115</span>   * equal when their cell views, as returned by {@link #cellSet}, are equal.<a name="line.115"></a>
<span class="sourceLineNo">116</span>   */<a name="line.116"></a>
<span class="sourceLineNo">117</span>  @Override<a name="line.117"></a>
<span class="sourceLineNo">118</span>  boolean equals(@Nullable Object obj);<a name="line.118"></a>
<span class="sourceLineNo">119</span><a name="line.119"></a>
<span class="sourceLineNo">120</span>  /**<a name="line.120"></a>
<span class="sourceLineNo">121</span>   * Returns the hash code for this table. The hash code of a table is defined<a name="line.121"></a>
<span class="sourceLineNo">122</span>   * as the hash code of its cell view, as returned by {@link #cellSet}.<a name="line.122"></a>
<span class="sourceLineNo">123</span>   */<a name="line.123"></a>
<span class="sourceLineNo">124</span>  @Override<a name="line.124"></a>
<span class="sourceLineNo">125</span>  int hashCode();<a name="line.125"></a>
<span class="sourceLineNo">126</span><a name="line.126"></a>
<span class="sourceLineNo">127</span>  // Mutators<a name="line.127"></a>
<span class="sourceLineNo">128</span><a name="line.128"></a>
<span class="sourceLineNo">129</span>  /** Removes all mappings from the table. */<a name="line.129"></a>
<span class="sourceLineNo">130</span>  void clear();<a name="line.130"></a>
<span class="sourceLineNo">131</span><a name="line.131"></a>
<span class="sourceLineNo">132</span>  /**<a name="line.132"></a>
<span class="sourceLineNo">133</span>   * Associates the specified value with the specified keys. If the table<a name="line.133"></a>
<span class="sourceLineNo">134</span>   * already contained a mapping for those keys, the old value is replaced with<a name="line.134"></a>
<span class="sourceLineNo">135</span>   * the specified value.<a name="line.135"></a>
<span class="sourceLineNo">136</span>   *<a name="line.136"></a>
<span class="sourceLineNo">137</span>   * @param rowKey row key that the value should be associated with<a name="line.137"></a>
<span class="sourceLineNo">138</span>   * @param columnKey column key that the value should be associated with<a name="line.138"></a>
<span class="sourceLineNo">139</span>   * @param value value to be associated with the specified keys<a name="line.139"></a>
<span class="sourceLineNo">140</span>   * @return the value previously associated with the keys, or {@code null} if<a name="line.140"></a>
<span class="sourceLineNo">141</span>   *     no mapping existed for the keys<a name="line.141"></a>
<span class="sourceLineNo">142</span>   */<a name="line.142"></a>
<span class="sourceLineNo">143</span>  V put(R rowKey, C columnKey, V value);<a name="line.143"></a>
<span class="sourceLineNo">144</span><a name="line.144"></a>
<span class="sourceLineNo">145</span>  /**<a name="line.145"></a>
<span class="sourceLineNo">146</span>   * Copies all mappings from the specified table to this table. The effect is<a name="line.146"></a>
<span class="sourceLineNo">147</span>   * equivalent to calling {@link #put} with each row key / column key / value<a name="line.147"></a>
<span class="sourceLineNo">148</span>   * mapping in {@code table}.<a name="line.148"></a>
<span class="sourceLineNo">149</span>   *<a name="line.149"></a>
<span class="sourceLineNo">150</span>   * @param table the table to add to this table<a name="line.150"></a>
<span class="sourceLineNo">151</span>   */<a name="line.151"></a>
<span class="sourceLineNo">152</span>  void putAll(Table&lt;? extends R, ? extends C, ? extends V&gt; table);<a name="line.152"></a>
<span class="sourceLineNo">153</span><a name="line.153"></a>
<span class="sourceLineNo">154</span>  /**<a name="line.154"></a>
<span class="sourceLineNo">155</span>   * Removes the mapping, if any, associated with the given keys.<a name="line.155"></a>
<span class="sourceLineNo">156</span>   *<a name="line.156"></a>
<span class="sourceLineNo">157</span>   * @param rowKey row key of mapping to be removed<a name="line.157"></a>
<span class="sourceLineNo">158</span>   * @param columnKey column key of mapping to be removed<a name="line.158"></a>
<span class="sourceLineNo">159</span>   * @return the value previously associated with the keys, or {@code null} if<a name="line.159"></a>
<span class="sourceLineNo">160</span>   *     no such value existed<a name="line.160"></a>
<span class="sourceLineNo">161</span>   */<a name="line.161"></a>
<span class="sourceLineNo">162</span>  V remove(@Nullable Object rowKey, @Nullable Object columnKey);<a name="line.162"></a>
<span class="sourceLineNo">163</span><a name="line.163"></a>
<span class="sourceLineNo">164</span>  // Views<a name="line.164"></a>
<span class="sourceLineNo">165</span><a name="line.165"></a>
<span class="sourceLineNo">166</span>  /**<a name="line.166"></a>
<span class="sourceLineNo">167</span>   * Returns a view of all mappings that have the given row key. For each row<a name="line.167"></a>
<span class="sourceLineNo">168</span>   * key / column key / value mapping in the table with that row key, the<a name="line.168"></a>
<span class="sourceLineNo">169</span>   * returned map associates the column key with the value. If no mappings in<a name="line.169"></a>
<span class="sourceLineNo">170</span>   * the table have the provided row key, an empty map is returned.<a name="line.170"></a>
<span class="sourceLineNo">171</span>   *<a name="line.171"></a>
<span class="sourceLineNo">172</span>   * &lt;p&gt;Changes to the returned map will update the underlying table, and vice<a name="line.172"></a>
<span class="sourceLineNo">173</span>   * versa.<a name="line.173"></a>
<span class="sourceLineNo">174</span>   *<a name="line.174"></a>
<span class="sourceLineNo">175</span>   * @param rowKey key of row to search for in the table<a name="line.175"></a>
<span class="sourceLineNo">176</span>   * @return the corresponding map from column keys to values<a name="line.176"></a>
<span class="sourceLineNo">177</span>   */<a name="line.177"></a>
<span class="sourceLineNo">178</span>  Map&lt;C, V&gt; row(R rowKey);<a name="line.178"></a>
<span class="sourceLineNo">179</span><a name="line.179"></a>
<span class="sourceLineNo">180</span>  /**<a name="line.180"></a>
<span class="sourceLineNo">181</span>   * Returns a view of all mappings that have the given column key. For each row<a name="line.181"></a>
<span class="sourceLineNo">182</span>   * key / column key / value mapping in the table with that column key, the<a name="line.182"></a>
<span class="sourceLineNo">183</span>   * returned map associates the row key with the value. If no mappings in the<a name="line.183"></a>
<span class="sourceLineNo">184</span>   * table have the provided column key, an empty map is returned.<a name="line.184"></a>
<span class="sourceLineNo">185</span>   *<a name="line.185"></a>
<span class="sourceLineNo">186</span>   * &lt;p&gt;Changes to the returned map will update the underlying table, and vice<a name="line.186"></a>
<span class="sourceLineNo">187</span>   * versa.<a name="line.187"></a>
<span class="sourceLineNo">188</span>   *<a name="line.188"></a>
<span class="sourceLineNo">189</span>   * @param columnKey key of column to search for in the table<a name="line.189"></a>
<span class="sourceLineNo">190</span>   * @return the corresponding map from row keys to values<a name="line.190"></a>
<span class="sourceLineNo">191</span>   */<a name="line.191"></a>
<span class="sourceLineNo">192</span>  Map&lt;R, V&gt; column(C columnKey);<a name="line.192"></a>
<span class="sourceLineNo">193</span><a name="line.193"></a>
<span class="sourceLineNo">194</span>  /**<a name="line.194"></a>
<span class="sourceLineNo">195</span>   * Returns a set of all row key / column key / value triplets. Changes to the<a name="line.195"></a>
<span class="sourceLineNo">196</span>   * returned set will update the underlying table, and vice versa. The cell set<a name="line.196"></a>
<span class="sourceLineNo">197</span>   * does not support the {@code add} or {@code addAll} methods.<a name="line.197"></a>
<span class="sourceLineNo">198</span>   *<a name="line.198"></a>
<span class="sourceLineNo">199</span>   * @return set of table cells consisting of row key / column key / value<a name="line.199"></a>
<span class="sourceLineNo">200</span>   *     triplets<a name="line.200"></a>
<span class="sourceLineNo">201</span>   */<a name="line.201"></a>
<span class="sourceLineNo">202</span>  Set&lt;Cell&lt;R, C, V&gt;&gt; cellSet();<a name="line.202"></a>
<span class="sourceLineNo">203</span><a name="line.203"></a>
<span class="sourceLineNo">204</span>  /**<a name="line.204"></a>
<span class="sourceLineNo">205</span>   * Returns a set of row keys that have one or more values in the table.<a name="line.205"></a>
<span class="sourceLineNo">206</span>   * Changes to the set will update the underlying table, and vice versa.<a name="line.206"></a>
<span class="sourceLineNo">207</span>   *<a name="line.207"></a>
<span class="sourceLineNo">208</span>   * @return set of row keys<a name="line.208"></a>
<span class="sourceLineNo">209</span>   */<a name="line.209"></a>
<span class="sourceLineNo">210</span>  Set&lt;R&gt; rowKeySet();<a name="line.210"></a>
<span class="sourceLineNo">211</span><a name="line.211"></a>
<span class="sourceLineNo">212</span>  /**<a name="line.212"></a>
<span class="sourceLineNo">213</span>   * Returns a set of column keys that have one or more values in the table.<a name="line.213"></a>
<span class="sourceLineNo">214</span>   * Changes to the set will update the underlying table, and vice versa.<a name="line.214"></a>
<span class="sourceLineNo">215</span>   *<a name="line.215"></a>
<span class="sourceLineNo">216</span>   * @return set of column keys<a name="line.216"></a>
<span class="sourceLineNo">217</span>   */<a name="line.217"></a>
<span class="sourceLineNo">218</span>  Set&lt;C&gt; columnKeySet();<a name="line.218"></a>
<span class="sourceLineNo">219</span><a name="line.219"></a>
<span class="sourceLineNo">220</span>  /**<a name="line.220"></a>
<span class="sourceLineNo">221</span>   * Returns a collection of all values, which may contain duplicates. Changes<a name="line.221"></a>
<span class="sourceLineNo">222</span>   * to the returned collection will update the underlying table, and vice<a name="line.222"></a>
<span class="sourceLineNo">223</span>   * versa.<a name="line.223"></a>
<span class="sourceLineNo">224</span>   *<a name="line.224"></a>
<span class="sourceLineNo">225</span>   * @return collection of values<a name="line.225"></a>
<span class="sourceLineNo">226</span>   */<a name="line.226"></a>
<span class="sourceLineNo">227</span>  Collection&lt;V&gt; values();<a name="line.227"></a>
<span class="sourceLineNo">228</span><a name="line.228"></a>
<span class="sourceLineNo">229</span>  /**<a name="line.229"></a>
<span class="sourceLineNo">230</span>   * Returns a view that associates each row key with the corresponding map from<a name="line.230"></a>
<span class="sourceLineNo">231</span>   * column keys to values. Changes to the returned map will update this table.<a name="line.231"></a>
<span class="sourceLineNo">232</span>   * The returned map does not support {@code put()} or {@code putAll()}, or<a name="line.232"></a>
<span class="sourceLineNo">233</span>   * {@code setValue()} on its entries.<a name="line.233"></a>
<span class="sourceLineNo">234</span>   *<a name="line.234"></a>
<span class="sourceLineNo">235</span>   * &lt;p&gt;In contrast, the maps returned by {@code rowMap().get()} have the same<a name="line.235"></a>
<span class="sourceLineNo">236</span>   * behavior as those returned by {@link #row}. Those maps may support {@code<a name="line.236"></a>
<span class="sourceLineNo">237</span>   * setValue()}, {@code put()}, and {@code putAll()}.<a name="line.237"></a>
<span class="sourceLineNo">238</span>   *<a name="line.238"></a>
<span class="sourceLineNo">239</span>   * @return a map view from each row key to a secondary map from column keys to<a name="line.239"></a>
<span class="sourceLineNo">240</span>   *     values<a name="line.240"></a>
<span class="sourceLineNo">241</span>   */<a name="line.241"></a>
<span class="sourceLineNo">242</span>  Map&lt;R, Map&lt;C, V&gt;&gt; rowMap();<a name="line.242"></a>
<span class="sourceLineNo">243</span><a name="line.243"></a>
<span class="sourceLineNo">244</span>  /**<a name="line.244"></a>
<span class="sourceLineNo">245</span>   * Returns a view that associates each column key with the corresponding map<a name="line.245"></a>
<span class="sourceLineNo">246</span>   * from row keys to values. Changes to the returned map will update this<a name="line.246"></a>
<span class="sourceLineNo">247</span>   * table. The returned map does not support {@code put()} or {@code putAll()},<a name="line.247"></a>
<span class="sourceLineNo">248</span>   * or {@code setValue()} on its entries.<a name="line.248"></a>
<span class="sourceLineNo">249</span>   *<a name="line.249"></a>
<span class="sourceLineNo">250</span>   * &lt;p&gt;In contrast, the maps returned by {@code columnMap().get()} have the<a name="line.250"></a>
<span class="sourceLineNo">251</span>   * same behavior as those returned by {@link #column}. Those maps may support<a name="line.251"></a>
<span class="sourceLineNo">252</span>   * {@code setValue()}, {@code put()}, and {@code putAll()}.<a name="line.252"></a>
<span class="sourceLineNo">253</span>   *<a name="line.253"></a>
<span class="sourceLineNo">254</span>   * @return a map view from each column key to a secondary map from row keys to<a name="line.254"></a>
<span class="sourceLineNo">255</span>   *     values<a name="line.255"></a>
<span class="sourceLineNo">256</span>   */<a name="line.256"></a>
<span class="sourceLineNo">257</span>  Map&lt;C, Map&lt;R, V&gt;&gt; columnMap();<a name="line.257"></a>
<span class="sourceLineNo">258</span><a name="line.258"></a>
<span class="sourceLineNo">259</span>  /**<a name="line.259"></a>
<span class="sourceLineNo">260</span>   * Row key / column key / value triplet corresponding to a mapping in a table.<a name="line.260"></a>
<span class="sourceLineNo">261</span>   *<a name="line.261"></a>
<span class="sourceLineNo">262</span>   * @since 7.0<a name="line.262"></a>
<span class="sourceLineNo">263</span>   */<a name="line.263"></a>
<span class="sourceLineNo">264</span>  interface Cell&lt;R, C, V&gt; {<a name="line.264"></a>
<span class="sourceLineNo">265</span>    /**<a name="line.265"></a>
<span class="sourceLineNo">266</span>     * Returns the row key of this cell.<a name="line.266"></a>
<span class="sourceLineNo">267</span>     */<a name="line.267"></a>
<span class="sourceLineNo">268</span>    R getRowKey();<a name="line.268"></a>
<span class="sourceLineNo">269</span><a name="line.269"></a>
<span class="sourceLineNo">270</span>    /**<a name="line.270"></a>
<span class="sourceLineNo">271</span>     * Returns the column key of this cell.<a name="line.271"></a>
<span class="sourceLineNo">272</span>     */<a name="line.272"></a>
<span class="sourceLineNo">273</span>    C getColumnKey();<a name="line.273"></a>
<span class="sourceLineNo">274</span><a name="line.274"></a>
<span class="sourceLineNo">275</span>    /**<a name="line.275"></a>
<span class="sourceLineNo">276</span>     * Returns the value of this cell.<a name="line.276"></a>
<span class="sourceLineNo">277</span>     */<a name="line.277"></a>
<span class="sourceLineNo">278</span>    V getValue();<a name="line.278"></a>
<span class="sourceLineNo">279</span><a name="line.279"></a>
<span class="sourceLineNo">280</span>    /**<a name="line.280"></a>
<span class="sourceLineNo">281</span>     * Compares the specified object with this cell for equality. Two cells are<a name="line.281"></a>
<span class="sourceLineNo">282</span>     * equal when they have equal row keys, column keys, and values.<a name="line.282"></a>
<span class="sourceLineNo">283</span>     */<a name="line.283"></a>
<span class="sourceLineNo">284</span>    @Override<a name="line.284"></a>
<span class="sourceLineNo">285</span>    boolean equals(@Nullable Object obj);<a name="line.285"></a>
<span class="sourceLineNo">286</span><a name="line.286"></a>
<span class="sourceLineNo">287</span>    /**<a name="line.287"></a>
<span class="sourceLineNo">288</span>     * Returns the hash code of this cell.<a name="line.288"></a>
<span class="sourceLineNo">289</span>     *<a name="line.289"></a>
<span class="sourceLineNo">290</span>     * &lt;p&gt;The hash code of a table cell is equal to {@link<a name="line.290"></a>
<span class="sourceLineNo">291</span>     * Objects#hashCode}{@code (e.getRowKey(), e.getColumnKey(), e.getValue())}.<a name="line.291"></a>
<span class="sourceLineNo">292</span>     */<a name="line.292"></a>
<span class="sourceLineNo">293</span>    @Override<a name="line.293"></a>
<span class="sourceLineNo">294</span>    int hashCode();<a name="line.294"></a>
<span class="sourceLineNo">295</span>  }<a name="line.295"></a>
<span class="sourceLineNo">296</span>}<a name="line.296"></a>




























































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